Coilcraft LPD6235 Coupled inductor Datasheet

Document 833-1
Coupled Inductors – LPD6235
For Flyback and
other Applications
Tight coupling (k ≥ 0.97) makes the LPD6235 series of
coupled inductors ideal for use in a variety of circuits
including flyback, multi-output buck, SEPIC and Zeta.
These coupled miniature shielded inductors are 3.5 mm
high and 6.0 mm square. They provide high inductance,
high efficiency and excellent current handling in low
cost part.
They can be used as two single inductors connected
in series or parallel, as a common mode choke or as a
1 : 1 transformer.
+
+
D
L1
C
L2
VOUT
C
VIN
–
SW
–
0.236 ±0.003
6,0 ±0,08
Typical Flyback Converter
L2
Dot indicates pin 1
1
D
+
VOUT
C
AUX
–
4
XXX X
2
Dash
number
+
0.236 ±0.003
6,0 ±0,08
+
VIN
3
L1
D
SW
–
–
Typical Buck Converter with auxiliary output
Internal
code
D
+
0.138
max
3,5
4
0.047
1,20
0.167 0.079
4,25 2,00
45°
typ
0.260
6,60
C
+
C1
L2
Q
–
C
+
Q
–
VOUT
–
Typical SEPIC schematic
+
VIN
0.079
2,00
0.167
4,25
0.260
6,60
0.079
2,00
2
VIN
3
2
L1
L1
Recommended
Land Pattern
1
1
VOUT
C
C
L2
C1
L1
D
Typical Zeta schematic
C
VOUT
–
4
Dimensions are in
L2
inches
mm
3
Document 833-1
Revised 11/09/15
Document 833-2
Coupled Inductors – LPD6235 Series
Part number1
Inductance
±20% (µH)
LPD6235-682MR_
LPD6235-103MR_
LPD6235-223MR_
LPD6235-473MR_
LPD6235-104MR_
6.8
10
22
47
100
LPD6235-474MR_
LPD6235-105MR_
LPD6235-155MR_
LPD6235-205MR_
2
470
1000
1500
2000
DCR
max3
(Ohms)
0.120
0.157
0.300
0.620
1.20
3.50
7.00
10.8
16.0
SRF
typ4
(MHz)
Coupling Leakage5
coefficient
L typ
typ
(µH)
31
26
15
9.7
7.0
0.99
0.99
>0.99
>0.99
>0.99
0.10
0.12
0.15
0.21
0.45
3.0
1.9
1.5
1.3
>0.99
>0.99
>0.99
>0.99
0.61
1.05
1.70
2.10
1. Please specify termination and packaging codes:
LPD6235-205MRC
Termination: R = RoHS compliant matte tin over nickel over silver.
Special order:
Q = RoHS tin-silver-copper (95.5/4/0.5) or
P = non-RoHS tin-lead (63/37).
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape (350 parts per full reel).
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
D = 13″ machine-ready reel. EIA-481 embossed plastic
tape. Factory order only, not stocked (1500 parts per
full reel).
2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms,
0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads
are connected in parallel, inductance is the same value. When leads
are connected in series, inductance is four times the value.
3. DCR is for each winding. When leads are connected in parallel, DCR
is half the value. When leads are connected in series, DCR is twice the
value.
4. SRF measured using an Agilent/HP 4191A or equivalent. When leads
are connected in parallel, SRF is the same value.
5. Leakage inductance is for L1 and is measured with L2 shorted.
6. DC current at 25°C that causes the specified inductance drop from its
value without current. It is the sum of the current flowing in both windings.
7. Equal current when applied to each winding simultaneously that
causes a 40°C temperature rise from 25°C ambient. This information is
for reference only and does not represent absolute maximum ratings.
8. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. This information is for reference
only and does not represent absolute maximum ratings.
9. Electrical specifications at 25°C.
Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.”
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
10%
drop
2.80
2.50
1.50
0.90
0.62
0.18
0.12
0.12
0.08
Isat (A)6 Irms (A)
20%
30%
both
one
drop
drop
windings7 winding8
3.00
3.12
1.40
1.98
2.70
2.80
1.30
1.83
1.67
1.73
0.85
1.20
0.98
0.99
0.60
0.85
0.72
0.74
0.40
0.56
0.22
0.14
0.12
0.11
0.23
0.15
0.13
0.12
0.25
0.15
0.14
0.11
0.35
0.21
0.20
0.16
Coupled Inductor Core and Winding Loss Calculator
This web-based utility allows you to enter frequency, peak-to-peak
(ripple) current, and Irms current to predict temperature rise and overall
losses, including core loss. Visit www.coilcraft.com/coupledloss.
Core material Ferrite
Weight 420 – 480 mg
Environmental RoHS compliant, halogen free
Terminations RoHS compliant matte tin over nickel over silver.
Other terminations available at additional cost.
Ambient temperature –40°C to +85°C with (40°C rise) Irms current.
Maximum part temperature +125°C (ambient + temp rise).
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Winding to winding isolation 100 V
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 350/7″ reel; 1500/13″ reel Plastic tape: 16 mm wide,
0.3 mm thick, 12 mm pocket spacing, 3.68 mm pocket depth
Recommended pick and place nozzle OD: 6.2 mm; ID: ≤ 3.1 mm
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Document 833-2
Revised 11/09/15
Document 833-3
Coupled Inductors – LPD6235 Series
L vs Current
L vs Frequency
10000
10000
2000 µH
1500 µH
1000 µH
470 µH
100
100 µH
47 µH
22 µH
10
1
470 µH
Current (A)
47 µH
22 µH
10 µH
6.8 µH
1
1
0.1
100 µH
100
10
10 µH
6.8 µH
0.01
1500 µH
1000 µH
1000
Inductance (µH)
Inductance (µH)
1000
2000 µH
10
0.1
1
10
100
Frequency (MHz)
Document 833-3
Revised 11/09/15
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